being careful to have the pit cleaned down to an even depth of 9 

 inches. The sack should be labeled: "First nine inches," with the 

 name of the station. Then obtain the second 9 inches in a similar 

 manner, being careful to label accordingly. These sacks should be 

 forwarded to the Department, where each sample will be weighed, 

 thoroughly mixed, put through a 2-mm. sieve, subsampled, and dis- 

 tributed, about forty pounds being retained for the control-pot 

 experiment. The moisture and basicity of all the samples will be 

 determined and the figures supplied, so that the results will be on 

 the same moisture-free basis, with the same correction for basic 

 matter. These figures will be sent out with the samples. 



Oak. 



Sprint] 

 Barley. 



, foil Sample 



Spring 

 Bye. 



Spring 



}\/ir<f/ . 



FIG. l.- Experiment plot, 60 feet square, 1-50 acre in each small square. 



In the seeding of the plots the soil is to be prepared by ordinary 

 plowing and smooth harrowing. Packages containing the four 

 kinds of seed will be supplied, and the entire contents of each pack- 

 are to be sown broadcast as uniformly as possible and covered 

 with a harrow. This will give a uniform rate of seeding with a uni- 

 form variety of seed. The plots will require no further attention 

 until harvest time. During the interval, work on the soil samples 

 can be progressing. When the crops are ready for harvesting use 

 tli" triangular cord measure, which will be supplied, and lay off a 

 definite area in the center of each of the four plots. This measure 

 will be a cord with three pegs attached, so that when all sides are 

 drawn tight it forms an equilateral triangle of 0.3 feet on each side, 



